Shuttle



ROWN

June 22, 1937.

INVENTOR. 634 EL 0. B/GOWN. BY

ATTORNEY.

Patented June 22, 1931 UNITED STATES PATENT OFFICE SHUTTLE ration ofMaine Application July 1,

4 Claims.

The present invention pertains to automatically threading loom shuttles,and has more particular reference to the threading devices of suchshuttles.

5 Shuttles of this type comprise a shuttle body containing anautomatically replaceable filling carrier, a side delivery eye, and athreading block for guiding the running filling into the delivery eyeduring the first two picks after the 10 transfer of a filling carrierinto the shuttle. The

threading block has a longitudinal thread passage and a horn whichprojects outwardly and rearwardly above thethread passage, the fillingbecoming threaded into the thread passage, beneath the horn, at thebeginning of the first pick after transfer. The horn is intended toguide the filling into the side delivery eye at the beginning of thesecond pick after transfer. In view of the possibility of the fillingbecoming unthreaded from beneath the horn instead of threading into thedelivery eye, it is desirable 7 that the shuttle be provided with threadengaging or guard means for preventing such unthreading.

The principal object of my invention is to prevent such unthreading byemploying, in an automatically threading loom shuttle having a shuttlebody, threading block and horn as aforesaid, a thread-engaging, guardwall which is formed integrally with the shuttle body and which extendsunder the horn in a manner to hold the filling from unthreading about adownturned end on the horn.

The aforementioned and other objects of the invention are accomplishedby the construction illustrated on the accompanying drawing, of

which:

Fig. l is a plan view of the thread delivery end of a shuttle having myinvention applied thereto; 40 Fig; 2 is a longitudinal sectional viewtaken approximately on line 2-2 of Fig. 1, but to a larger scale; and

Fig. 3 is a view in cross-sectiontaken'approximately on line 3--3 ofFig. 2.

The shuttle shown on the drawing comprises a shuttle body I 'having alongitudinal cavity 2 for reception of a filling carrier such as bobbin3, and the threading instrumentalities hereinafter described in detail.The shuttle body is 50 provided with any conventional means (not shown)for releasably holding the bobbin in the cavity and permitting thebobbin to be automatically replaced by a fresh one whenever the fillingsupply becomes substantially exhausted.

The threading instrumentalities include a side 1936, Serial No. 88,437

delivery eye 4 formed in the front wall of the shuttle in the usualmanner, and a suitable threading block for leading the filling into thedelivery eye during the first two picks after transfer. The threadingblock is fixed in a recess 5 in the shuttle body and comprises a fioor6, front and rear walls 1 and 8, respectively, a scroll 9, and a hornIII which projects outwardly and rearwardly from the front of thethreading block. Threading blocks having these characteristics aregenerally old.

The expressions denoting direction, as herein employed, are applicableto the shuttle when the latter is considered to be positioned in a loomand boxed at the side of the loom toward which the tip ll of the shuttlepoints. Thus, forwardly is in a direction toward the front of the loomand outwardly is in a direction from the cavity 2 toward the tip ll ofthe shuttle.

The shuttle is provided with a longitudinal thread passage defined inpart by the recess 5 and in part by the walls and floor of the threadingblock. The horn I is located above the thread passage and extendsrearwardly preferably to a point substantially in alignment with therear wall 8 of the threading block. The rearward end of the horn is freeand is turned downwardly as at I 2 into a depression IS. The depressionis conveniently comprised of a channel formed in the shuttle body andextending longitudinally outwardly from the outer end of the recess 5.The channel is, preferably located or positioned rearwardly from thelongitudinal axis of the thread passage, in alignment with the rear sideof the latter.

The shuttle body is provided with a space, beneath the horn, which maybe in the form of a slot I4, to receive the running filling during thefirst pick after transfer. This slot is located in front of the channell3, and preferably forward- 1y from the longitudinal axis of the threadpassage, the slot extending longitudinally outwardly from the outer endof the recess substantially in alignment with the front side of thethread passage. The channel and slot are separated by a longitudinalthread engaging wall l5 which extends beneath the horn Ill.

The wall I5, according to the present invention, is formed, integrallywith the shuttle body and is at least as long as the width of the horn.

The wall is located in front of the down-turned end I 2 of the horn andprojects to a height materially above said end. In the preferred form,as shown, the wall is located slightly forwardly from the longitudinalaxis of the thread passage and ill in for reception of extends from theouter end of the recess 5 almost to the tip of the shuttle. The wall, tosatisfactorily perform its intended function, should be at least longenough to extend from the inner to the outer side of the horn, andthewall immediately beneath the horn must project materially above thedown-turned end l2.

In the operation of the shuttle in a loom, a bobbin is transferred intothe shuttle when the shuttle is boxed as above described. At such time,the filling end f extends from the bobbin outwardly and upwardly, overthe threading block, to the usual fixed holder (not shown). Thereafterthe shuttle is movedbodily rearwardly andthen picked toward the left,Fig. 1. As the shuttle is thus picked, the filling in unwinding from thebobbin rotates and balloons so that it passes downwardly behind the freeend of the horn l0, forwardly beneath the down-turned end l2, and thencethrough the space between the underneath side of the horn and the top ofthe wall, to a position in the slot l4, Figs. 1 and 2. This threading ofthe filling into the thread passage and slot beneath the horn occursearly in the first pick after transfer and the filling continues to runin this path throughout the remainder of the pick. 1

After the shuttle is boxedat the end of the first. pick, it is movedbodily forwardly and rearwardly and then picked in the oppositedirection. Such movements of the shuttle slacken the filling and permitit to loop, twist and kink. The thread engaging wall I 5 prevents thethus slackened filling from escaping about the rearward free end of thehorn l0 and 'thus'insures the passage oi the filling down into the sidedelivery eye 4 during the second pick after transfer.

It is not broadly new to provide an integral thread-engaging wall toassist in the preventing of the escape of the filling from beneath thehorn of a threading block. The novelty in the present constructionincludes the extending" of such wall beneath the horn at a height abovethe down-turned end of the latter. By this means, the filling is heldforwardly from the rearward free end of the horn entirely by the wall,eliminating any openihgbetween the horn and the wall exceptthe spaceoverthe top of the wall. It will be apparent that the filling cannot escapeabout the free end of the horn by passing over the top of the wall.

Having fully disclosed the preferred embodiment of my invention, Iclaim:

:1. An automatically threading loom shuttle comprismg a shuttle'bodyhaving a cavity therea filling carrier, a threading block fixed in arec'essin saidshuttle body, said threading block having a longitudinalthread pas sage communicating with'said cavity, said shuttle body havinga longitudinal channel and a longitudinal thread-receiving slotextending outwardly from said recess, said channel being positionedrearwardly fromand said slot being positioned forwardly f om thelongitudinal axis of said threadpassage, said threading block having ahorn which projects from the front of the threadmg block outwardly andrearwardly above said slot, the rearward end of said horn being turnedwnwardly into said channel, said channel and j d .8101 being separatedby a guard wall formed m eg y with said shuttle body, said Wallextendlng beneath said horn. from the inner to the outer side thereof,said wall immediately beneathi said horn being spaced forwardly fromsaidi down-turned end and projecting materially above the same.

2. An automatically threading loom shuttle comprising a shuttle bodyhaving a cavity therein. for reception of a filling carrier, athreading: block having a longitudinal thread passage com municatingwith saidcavity, said shuttle body; having a depression formed. thereinoutwardly from said thread passage and a space forwardly from saiddepression in position to receive the running filling during the firstpick after transfer, said depression and space being separated by athread engaging wall, said wall being; formed integrally with saidshuttle body and extending longitudinally thereof substantially inalignment with said thread passage, said threading block'- having a hornwhich projects from the front of the threading block outwardly andrearwardly" across said wall entirely above the same, the rearward endof said horn being free" and being turned downwardly into saiddepression at a point materially outwardly of the shuttle from theinner: end of said wall.

3. An automatically. threading loom shuttle comprising a shuttle bodyhaving a cavity therein for reception of a filling carrier, 2.threading.

block having a longitudinal thread passage communicating with saidcavity, said shuttle body having a depression formed therein, saiddepres sion extending outwardly from said thread passage substantiallyin longitudinal alignment with the rearward side thereof, said threadingblock having a horn which projects from the front of I said depressionbeing separated by a guard wall formedintegrally with the shuttle body,said wall ext'endingfrom a point inwardly of said horn beneath thelatter to a point outwardly beyond the: same, said wall from'end to endthereof project ing materially above the down-turned end of said. horn.

4. automatically threading loom shuttle comprising a shuttle body havinga cavity therein for reception of a filling carrier, a threading blockfixed in a'recess in said shuttle body, said threading block having alongitudinal thread passage communicating with saidcavity and a hornwhich projects from the front of the threading block outwardly andrearwardly to a point substantially in alignment with the rear wall ofsaid thread passage, the rearward end of said horn being .free and beingturned downwardly, said shuttle body having an integral guard wallextending beneath said horn in front of said downturned end, said wallbeing at least as long as the width of said horn and extending to theopposite sides thereof, said wall immediately beneath said hornprojecting materially above said downturned end, there being space aboutthe free end of said horn and between the under surface of said .hornand the top of said wall to permit the running filling to thread to aposition in front of d wall during the first pick after transfer.

D. BROWN.

